--- will you be in Guangzhou?
---I am going to leave for Beijing in two months’ time.
A. How soon
B. How far
C. How often
D. How long
网友回答
A. How soon
B. How far
C. How often
(答案→)D. How long
解析：此题重点考查疑问词辨析，How long表示 “时间多久或物体多长”. 表示时间侧重指 “一段时间”.针对 “How long” 的回答一般是时间段；How often表示 “多少时间一次或每隔多久”.是就做某事的频率提问；How soon表示 “多久之后”.侧重某人某事能多快时间完成；How far表示“多远”，根据句意故选D